Author: PuTI
why my 3D image is not extruded in 3D software?
Hello, i have 3D image but when I view the image in the 3D software to be printed, the image does not extrude. here i attached my code and images. can anyone check on my code. Many thanks.
a = imread (‘stomachgray.tif’);
mask = zeros(size(a));
mask(100:end-100,100:end-100) = 1;
bw = activecontour(a,mask,1000);
c = im2double(bw);
shading flat
d = imgaussfilt3 (c,4);
colormap(bone)
h = hgtransform;
mesh(d*100, ‘Parent’, h, ‘FaceColor’, ‘r’ )
view(3)
lighting gouraud
camlight right
% Make it taller
set (gca, ‘units’, ‘cent’)
set(h, ‘Matrix’, makehgtform(‘scale’, [10 10 500]))
[X,Y] = meshgrid(1:length(h));
surf2stl(‘stomachSurf7.stl’,X,Y,d);
end
<</matlabcentral/answers/uploaded_files/64209/3d%20mtlb.JPG>>
<</matlabcentral/answers/uploaded_files/64210/3d%20view.JPG>>Hello, i have 3D image but when I view the image in the 3D software to be printed, the image does not extrude. here i attached my code and images. can anyone check on my code. Many thanks.
a = imread (‘stomachgray.tif’);
mask = zeros(size(a));
mask(100:end-100,100:end-100) = 1;
bw = activecontour(a,mask,1000);
c = im2double(bw);
shading flat
d = imgaussfilt3 (c,4);
colormap(bone)
h = hgtransform;
mesh(d*100, ‘Parent’, h, ‘FaceColor’, ‘r’ )
view(3)
lighting gouraud
camlight right
% Make it taller
set (gca, ‘units’, ‘cent’)
set(h, ‘Matrix’, makehgtform(‘scale’, [10 10 500]))
[X,Y] = meshgrid(1:length(h));
surf2stl(‘stomachSurf7.stl’,X,Y,d);
end
<</matlabcentral/answers/uploaded_files/64209/3d%20mtlb.JPG>>
<</matlabcentral/answers/uploaded_files/64210/3d%20view.JPG>> Hello, i have 3D image but when I view the image in the 3D software to be printed, the image does not extrude. here i attached my code and images. can anyone check on my code. Many thanks.
a = imread (‘stomachgray.tif’);
mask = zeros(size(a));
mask(100:end-100,100:end-100) = 1;
bw = activecontour(a,mask,1000);
c = im2double(bw);
shading flat
d = imgaussfilt3 (c,4);
colormap(bone)
h = hgtransform;
mesh(d*100, ‘Parent’, h, ‘FaceColor’, ‘r’ )
view(3)
lighting gouraud
camlight right
% Make it taller
set (gca, ‘units’, ‘cent’)
set(h, ‘Matrix’, makehgtform(‘scale’, [10 10 500]))
[X,Y] = meshgrid(1:length(h));
surf2stl(‘stomachSurf7.stl’,X,Y,d);
end
<</matlabcentral/answers/uploaded_files/64209/3d%20mtlb.JPG>>
<</matlabcentral/answers/uploaded_files/64210/3d%20view.JPG>> mesh, extrude, matlab, 3d image MATLAB Answers — New Questions
Your AI Companion
As I look back on the incredible impact that Microsoft has had over its now 50 years of relentless innovation, I’m inspired by the simplicity and power of Bill Gates’ bold ambition all those years ago: to put a PC on every desk and in every home. At Microsoft AI we’re driven by that same spirit. Today, we’re creating Copilot, an AI companion for everyone.
What does this mean? What does it look like? What does it do? Truth is, there’s no single answer that captures it. Because it’s going to look and feel a little different for each of us.
An AI companion is completely personal, built around individual needs, values and expectations. That’s why ultimately, there will be as many different Copilots as there are people using them. Today, we are embarking on the journey to take Copilot from an AI companion to your AI companion.
With your permission, Copilot will now remember what you talk about, so it learns your likes and dislikes and details about your life: the name of your dog, that tricky project at work, what keeps you motivated to stick to your new workout routine.
Copilot will understand you in the context of your life, and show up, on your terms, in the right way at the right time. This is far richer, more dynamic, supportive and emergent than any software we’ve seen before. It’s a new kind of relationship with technology, a new era.
Of course, we’re also focusing on the fundamentals: engaging personality, incredible search capability, custom-made answer cards, bespoke podcasts. With Deep Research you have a world-class researcher working alongside you. With Shopping, a trusted, impartial partner, looking out for the best products and deals. With Actions, let Copilot shoulder some of the burden, from scoring the gig tickets to sorting the ride home. Our new Windows app means your computer finally works on your behalf. And now with Copilot Vision on Mobile, Copilot can see what you see, responding in real time to create a shared understanding of your world.
But the important point is that throughout Copilot is more than an AI, it’s yours. It remembers not just what you said, but who you are. Copilot helps you stay organized, think clearly, learn more intuitively. It’s there when you need a quick factual answer, a long exploratory debate or when you fancy just downloading after a hard day.
Every day we hear the most incredible stories about the many and varied ways people enjoy Copilot. So, as we continue on our journey to create a Copilot for everyone, we’re focusing on one critical goal: to make it truly yours. Each will have its own unique style and blend of attributes that distinctly suit each and every one of us. All the while, we’ll stick to our core promise. You remain in control, you are the pilot and you make the calls and set the boundaries.
We can’t wait for you to discover your personal Copilot.
Mustafa Suleyman, Executive Vice President and CEO of Microsoft AI
__________
Today, we announced a set of new updates that represent the next chapter in our vision to deliver a true AI companion — helping make AI more useful by making it more personal.
Memory and Personalization
Memory is essential for creating a true AI companion. With Memory, Copilot can remember important details: your favorite food, the types of films you enjoy and your nephew’s birthday and his interests. As you interact with Copilot, it notes your preferences, building a richer user profile and offering tailored solutions, proactive suggestions and timely reminders. Copilot prioritizes security and privacy, giving you control through the user dashboard and the option to choose which types of information it remembers about you or to opt out entirely. You remain in control.
As we explore the full range of what true personalization means, we are experimenting with new ways for you to interact with your Copilot. For example, what if your Copilot had an appearance and you could shape and form it to be whatever you want? We’re early in this thinking but soon you’ll have the ability to personalize Copilot and interact with your AI companion in a fun way while it offers advice and support when you want it. You can strike up a conversation with Copilot and now have an entertaining appearance that’s unique to you.
Actions
Another key advancement that makes Copilot a helpful AI companion is its ability to now take action on your behalf. With Actions, Copilot can now partner with you to complete tasks behind the scenes. Use simple chat prompts to ask Copilot to book event tickets, grab dinner reservations or send a thoughtful gift to a friend and it will check that task off your list. Copilot Actions will work with most websites across the web, and we’re particularly excited to highlight our launch partners: 1-800-Flowers.com, Booking.com, Expedia, Kayak, OpenTable, Priceline, Tripadvisor, Skyscanner, Viator and Vrbo.
Copilot Vision
We introduced Vision in Copilot for the web late last year and now we’re bringing it to mobile and Windows.
- Copilot and your phone’s camera now enable an interactive experience with the real world, in real time. From the Copilot app on your phone, you can look around at your surroundings and request information, guidance or ideas. It can analyze both real-time video from the camera and photos stored on your camera roll. For example, use Vision to improve plant health by asking it to examine your plants and suggest actions, or to scan your office and provide tips on decoration. Vision on Mobile is available today in the Copilot app for iOS and Android.
- The new native Windows app will allow you to call upon Copilot while working across multiple applications, browser tabs or files. It will read the screen and interact with the content. You’ll be able to use Copilot to search, change settings, organize files and collaborate on projects without switching between files or apps. The Copilot app can be accessed by hitting Alt+Space or holding Alt+Space for two seconds to use voice commands. The native Copilot app for Windows is available today. Vision will be available first for Windows Insiders starting next week and will be rolled out more broadly afterwards.
Pages
Copilot now provides a way to organize your thoughts and content from chaos to calm. It takes all your scattered notes, content, research — whatever it is — and puts it in a canvas that Copilot organizes, simplifies and helps you with from your first rough draft to your very final edits. Pages lets you refine, iterate and keep the conversation going whenever you need it.
Podcasts
Copilot can now generate AI-powered podcasts that curate and deliver personalized audio content based on your interests. Podcasts give you an easy, engaging and different way to consume information with minimal effort. Copilot can create a personalized podcast to analyze and compare options like with a vacation plan or home purchase or you can provide content to Copilot like a study or specific web sites and Copilot will generate a podcast that helps explain the topic. While listening, you can continue to talk and interact with Copilot to learn more and keep the conversations going. It’s a daily audio solution that helps you solve tough problems, explore a new hobby or just enjoy an easy to digest solution to all that endless scrolling.
Shopping
Copilot is now your personal shopper: on your side, doing the research, building comparisons, offering advice. It lets you know about price drops and sales and will let you purchase directly from the app. Shopping with Copilot is the easy solution to find the products and services you love.
Deep Research
Deep Research is a new feature for Copilot that lets you conduct complex, multi-step research tasks more efficiently — shaving hours off the time it would normally take to complete. Copilot can find, analyze and combine information from online sources or large amounts of documents and images.
Copilot Search
Copilot Search in Bing transforms web search by bringing traditional and generative search together. It cross-checks information across multiple sites to deliver detailed, comprehensive responses directly in Bing, complete with helpful cited sources and suggestions for further exploration. You can learn more about Copilot Search here.
We’re beginning to roll out the initial versions of these new experiences starting today. We will continue to expand availability in the coming weeks and months, which will vary by platform, market and language as we work through the rollout process. We will continue to listen to feedback from customers, adjusting and refining these experiences over time.
If you haven’t tried Copilot yet, download the app for free today at the Microsoft Store or at app stores for iOS, Mac or Android, experience the best AI companion for Windows on a Copilot+ PC or use Copilot on the web at copilot.microsoft.com. Thank you for being on this journey with us and here’s to the next 50 years of Microsoft.
The post Your AI Companion appeared first on The Official Microsoft Blog.
As I look back on the incredible impact that Microsoft has had over its now 50 years of relentless innovation, I’m inspired by the simplicity and power of Bill Gates’ bold ambition all those years ago: to put a PC on every desk and in every home. At Microsoft AI we’re driven by that same…
The post Your AI Companion appeared first on The Official Microsoft Blog.Read More
Celebrating Microsoft’s 50 years
Satya Nadella, Chairman and CEO, shared the following remarks at Microsoft’s 50th anniversary today.
It’s so wonderful to be here with all of you celebrating 50 years of Microsoft. And it’s especially exciting to be doing it at a time like this. For me, though, it starts with Bill [Gates] and Steve [Ballmer], who are both here with us today. I want to say a very big thank you to the two of you, and to Paul [Allen], and what you’ve meant to me personally and your vision that you had building this extraordinary company of ours that I’ve had the privilege to be part of. Thank you for your vision, your leadership, your passion, and for building the Microsoft that we know today. A company that has truly changed the world.
Fifty years ago, Bill and Paul started Microsoft with a simple but powerful idea: to build technology so people everywhere could build more technology. The very first product Microsoft built was the Basic interpreter for the Altair, giving people the power to create software, jumpstarting the PC revolution, and creating an entirely new sector for our economy.
But today, it’s not just about the past 50 years, it’s about the next 50. If there’s one thing that I have learned during my time at Microsoft, it’s not about longevity, but relevance. Our future will not be defined by what we have built, but what we empower others to build.
This is why we are leading this new wave of AI innovation and more importantly, democratizing it, just like we did with the PC. From there we’ve gone to chat, to multi file edits, and now to agents. More than 150 million developers in nearly every country around the world are using GitHub.
So, I thought to myself, what if I could take that power and rebuild Microsoft’s very first product? And so, I tried it.
You really know you’re on to something. Intelligence has been commoditized when CEOs can start vibe coding. But in all seriousness, this is not just a cool party trick, It’s transformational. It’s empowering. It’s unleashing human ambition. And it’s happening now.
In fact, I’m excited to share that the capability I just showed with Agent Mode is rolling out to all Visual Studio Code users starting today. We now have autonomous AI agents or peer programmers who can collaborate with us to anticipate our needs and help us think more creatively, and it does not stop there. We are bringing full MCP support to Agent Mode; we’re also launching Code Review Agent today to fix and find bugs automatically; we’re also making it easier than ever before for developers to build their own agents in Azure AI Foundry.
Think of it like an agent factory. It’s a production line for intelligence. Tens and thousands of organizations are using Foundry to build their own agents. And today, we’re going further. We now have a new agent framework for building multi-agent systems. But building agents is just the very beginning. We’re also building tools for all the evals, fine tuning, observability, and feedback. And you’ll also have a red teaming agent and tools to measure code vulnerabilities. All of this in support of building trustworthy AI systems. There’s much, much more to come.
What started out as a developer tools company 50 years ago is now a platform company where everyone can be a developer. Our mission has not changed, it’s only expanded.
Just as we have done always, we are putting the power in people’s hands so that they can build software that moves their communities, their countries forward. The same ethos is driving Copilot, not just for developers, but for every aspect of working life. Helping people do things that allow them to do more things, whether it’s building apps, doing homework, shopping, planning, and so much more.
Ultimately, it all comes down to our mission to empower every person and every organization on the planet to achieve more. I’ve always thought of Microsoft as a platform and partner-first company, and this has only been possible because of our customers, our partners and developers, and our 1.6 million employees, past and present, who have connected their passion with our purpose to get us where we are today. And it’s you who will continue to build this company to have impact around the world well into the future.
So, from the bottom of my heart, a big thank you to everyone who has contributed to Microsoft in getting us to this moment. I can’t wait to see what is next with Copilot and everything that we have for you.
Remarks have been edited for clarity.
Photo: Bill Gates, Microsoft Co-founder and Gates Foundation Chair; Steve Ballmer, former Microsoft CEO and Ballmer Group Co-founder; and Satya Nadella, Microsoft Chairman and CEO, on stage at the anniversary event. (Photo by Dan DeLong)
The post Celebrating Microsoft’s 50 years appeared first on The Official Microsoft Blog.
Satya Nadella, Chairman and CEO, shared the following remarks at Microsoft’s 50th anniversary today. It’s so wonderful to be here with all of you celebrating 50 years of Microsoft. And it’s especially exciting to be doing it at a time like this. For me, though, it starts with Bill [Gates] and Steve [Ballmer], who are…
The post Celebrating Microsoft’s 50 years appeared first on The Official Microsoft Blog.Read More
How can ı solve this triangle problem at MATLAB?
In the triangle which has edges names:a,b,c; a=9 b=18 c=25 how can ı calculate the alfa(the angles sees a) with the law of cosines? with MATLABIn the triangle which has edges names:a,b,c; a=9 b=18 c=25 how can ı calculate the alfa(the angles sees a) with the law of cosines? with MATLAB In the triangle which has edges names:a,b,c; a=9 b=18 c=25 how can ı calculate the alfa(the angles sees a) with the law of cosines? with MATLAB matlab, mathematics, homework MATLAB Answers — New Questions
I need to rotate my 3D figure
I have particle size data for differrent De(parameter) values.
I have plotted 2Dbar graphs, I want stack all figures into one 3D figure window.
I stacked everything, that looks like the image below
But I want to rotate axis in such a way that: Particle_density(Y-axis) in vertical, Particle size(X-axis) in horizontal and De (z-axis) per pendicular to the screen. It should look like this image below
I have attached my matlab code to this thread.
Please guide me, how to do this. Thanks in advanceI have particle size data for differrent De(parameter) values.
I have plotted 2Dbar graphs, I want stack all figures into one 3D figure window.
I stacked everything, that looks like the image below
But I want to rotate axis in such a way that: Particle_density(Y-axis) in vertical, Particle size(X-axis) in horizontal and De (z-axis) per pendicular to the screen. It should look like this image below
I have attached my matlab code to this thread.
Please guide me, how to do this. Thanks in advance I have particle size data for differrent De(parameter) values.
I have plotted 2Dbar graphs, I want stack all figures into one 3D figure window.
I stacked everything, that looks like the image below
But I want to rotate axis in such a way that: Particle_density(Y-axis) in vertical, Particle size(X-axis) in horizontal and De (z-axis) per pendicular to the screen. It should look like this image below
I have attached my matlab code to this thread.
Please guide me, how to do this. Thanks in advance rotation, bar, plot3 MATLAB Answers — New Questions
How to fill a volume with spheres?
Hi,
I’d like to import *.stl files of different shapes and fill the volume with overlapping spheres.
How can I do it. I already did this task for 2D shapes using bwdist. But for 3D shapes, I don’t know how to do it.
ThanksHi,
I’d like to import *.stl files of different shapes and fill the volume with overlapping spheres.
How can I do it. I already did this task for 2D shapes using bwdist. But for 3D shapes, I don’t know how to do it.
Thanks Hi,
I’d like to import *.stl files of different shapes and fill the volume with overlapping spheres.
How can I do it. I already did this task for 2D shapes using bwdist. But for 3D shapes, I don’t know how to do it.
Thanks 3d, shapes, spheres, volume filling MATLAB Answers — New Questions
how to use stlwrite function options
Hi guys, i have to make a triangulation 3D of a solid of which i have the coordinates (x,y,z) of 20ooo points and i need to export the result (so the tetrahedra) to an stl file.
How can I use properly the stlwrite function, in particular the option indicated with TRIANGULATION?
thanks a lot.Hi guys, i have to make a triangulation 3D of a solid of which i have the coordinates (x,y,z) of 20ooo points and i need to export the result (so the tetrahedra) to an stl file.
How can I use properly the stlwrite function, in particular the option indicated with TRIANGULATION?
thanks a lot. Hi guys, i have to make a triangulation 3D of a solid of which i have the coordinates (x,y,z) of 20ooo points and i need to export the result (so the tetrahedra) to an stl file.
How can I use properly the stlwrite function, in particular the option indicated with TRIANGULATION?
thanks a lot. triangulation delaunay stl .stl stlwrite MATLAB Answers — New Questions
Spider Plot with Standard Deviation as shaded region
I want to plot a spider plot where each spoke represents the average value with solid line. In addition, I want to show standard deviation as shaded region around the average plot (Average+SD and Average-SD). I have attached a figure to show the desired outcome.
Figure available at: https://www.mdpi.com/2078-2489/15/6/364
Thank you in advance.I want to plot a spider plot where each spoke represents the average value with solid line. In addition, I want to show standard deviation as shaded region around the average plot (Average+SD and Average-SD). I have attached a figure to show the desired outcome.
Figure available at: https://www.mdpi.com/2078-2489/15/6/364
Thank you in advance. I want to plot a spider plot where each spoke represents the average value with solid line. In addition, I want to show standard deviation as shaded region around the average plot (Average+SD and Average-SD). I have attached a figure to show the desired outcome.
Figure available at: https://www.mdpi.com/2078-2489/15/6/364
Thank you in advance. spider plots, standard deviation, shaded region MATLAB Answers — New Questions
Setting axes with center in origin (0,0) in plotted variables.
Hey community, I have two variables with <10 x 1> double data. I am to plot these two in a plot, but would like to have the axes to be intersecting each other in origin (0,0). Instead in the axes are shown with intersecting at for example (-2000,-6), my lowest x-value is -1200, lowest y-value is -6. Here it would be great to have the x-axis through y=0, so that differences from y=0 easily can be seen graphically.
How would I do that, is there a command you could use in the script written, to make it move the axes? I have a large script to evaluate a lot of graphs in, so a MATLAB-command would be preferable to a tool in the figure builder.
The (simple) code used is as following:
%% person5 – Puls
hold on
plot(person5_ethanol_ekgpuls_tid,person5_ethanol_ekgpuls,’g.-‘)
xlabel(‘Tid/Sek’)
ylabel(‘Blodtryk/MmHg’)
title(‘Forsøgsperson #5 Ethanol Ekg Puls’)
Hope that my question is understandable and that it can be done.Hey community, I have two variables with <10 x 1> double data. I am to plot these two in a plot, but would like to have the axes to be intersecting each other in origin (0,0). Instead in the axes are shown with intersecting at for example (-2000,-6), my lowest x-value is -1200, lowest y-value is -6. Here it would be great to have the x-axis through y=0, so that differences from y=0 easily can be seen graphically.
How would I do that, is there a command you could use in the script written, to make it move the axes? I have a large script to evaluate a lot of graphs in, so a MATLAB-command would be preferable to a tool in the figure builder.
The (simple) code used is as following:
%% person5 – Puls
hold on
plot(person5_ethanol_ekgpuls_tid,person5_ethanol_ekgpuls,’g.-‘)
xlabel(‘Tid/Sek’)
ylabel(‘Blodtryk/MmHg’)
title(‘Forsøgsperson #5 Ethanol Ekg Puls’)
Hope that my question is understandable and that it can be done. Hey community, I have two variables with <10 x 1> double data. I am to plot these two in a plot, but would like to have the axes to be intersecting each other in origin (0,0). Instead in the axes are shown with intersecting at for example (-2000,-6), my lowest x-value is -1200, lowest y-value is -6. Here it would be great to have the x-axis through y=0, so that differences from y=0 easily can be seen graphically.
How would I do that, is there a command you could use in the script written, to make it move the axes? I have a large script to evaluate a lot of graphs in, so a MATLAB-command would be preferable to a tool in the figure builder.
The (simple) code used is as following:
%% person5 – Puls
hold on
plot(person5_ethanol_ekgpuls_tid,person5_ethanol_ekgpuls,’g.-‘)
xlabel(‘Tid/Sek’)
ylabel(‘Blodtryk/MmHg’)
title(‘Forsøgsperson #5 Ethanol Ekg Puls’)
Hope that my question is understandable and that it can be done. axes in plots, plot, figures, moving axes, origin MATLAB Answers — New Questions
How to programmatically get a list of all app properties in AppDesigner
Hi,
I’m writing a large app in appDesigner, and I want to create a list / text area that would display all of the app property fields. I can’t find a way to programatically pull their names, does anyone know a way of doing this?
P.S. I’m on 2022b.
Thanks!
VSHi,
I’m writing a large app in appDesigner, and I want to create a list / text area that would display all of the app property fields. I can’t find a way to programatically pull their names, does anyone know a way of doing this?
P.S. I’m on 2022b.
Thanks!
VS Hi,
I’m writing a large app in appDesigner, and I want to create a list / text area that would display all of the app property fields. I can’t find a way to programatically pull their names, does anyone know a way of doing this?
P.S. I’m on 2022b.
Thanks!
VS appdesigner MATLAB Answers — New Questions
How to make only x-axis invisible (y-axis stays visible)?
I have two axes (top, bottom) in a GUI. I do not want the x-axis of the top ghraph to be present (because it is the same as the bottom x-axis). I could not find how to handle separately the x and y axis visibility.
CsabaI have two axes (top, bottom) in a GUI. I do not want the x-axis of the top ghraph to be present (because it is the same as the bottom x-axis). I could not find how to handle separately the x and y axis visibility.
Csaba I have two axes (top, bottom) in a GUI. I do not want the x-axis of the top ghraph to be present (because it is the same as the bottom x-axis). I could not find how to handle separately the x and y axis visibility.
Csaba axis, visibility MATLAB Answers — New Questions
How do I link to Simulink variable from app designer
Ive created a model in app designer and want to change an image in the app based on the state of a value in the model. For example image is a pump and if the Simulink model state is 0 I want to use the closed pump image, if the state is 1 use the pump running image etc. The image widget doesn’t support bindings. that’s OK I can set up my own function and schedule it to run every second to check the pump state. In the model I have a variable setup that’s being logged. In the app I’m then trying to access that variable using: app.Simulation.LoggedSignals(‘PumpCtrlMdl/PumpState:1’).Values But this returns empty. How would I update my code so I get the value of the output value correctly?Ive created a model in app designer and want to change an image in the app based on the state of a value in the model. For example image is a pump and if the Simulink model state is 0 I want to use the closed pump image, if the state is 1 use the pump running image etc. The image widget doesn’t support bindings. that’s OK I can set up my own function and schedule it to run every second to check the pump state. In the model I have a variable setup that’s being logged. In the app I’m then trying to access that variable using: app.Simulation.LoggedSignals(‘PumpCtrlMdl/PumpState:1’).Values But this returns empty. How would I update my code so I get the value of the output value correctly? Ive created a model in app designer and want to change an image in the app based on the state of a value in the model. For example image is a pump and if the Simulink model state is 0 I want to use the closed pump image, if the state is 1 use the pump running image etc. The image widget doesn’t support bindings. that’s OK I can set up my own function and schedule it to run every second to check the pump state. In the model I have a variable setup that’s being logged. In the app I’m then trying to access that variable using: app.Simulation.LoggedSignals(‘PumpCtrlMdl/PumpState:1’).Values But this returns empty. How would I update my code so I get the value of the output value correctly? simulink, appdesigner MATLAB Answers — New Questions
Bug in readtable()? – if the first values in a CSV’s column are missing, the whole column is misinterpreted
I am reading a big CSV file (500K lines) with readtable. In the CSV, some columns have the first 250+ lines empty (e.g. ",,,," in the CSV), while the non-missing values below (pretty rare) are either text strings or dates (in the DD-MM-YYYY format). Readtable() somehow interprets these columns as numeric, and so converts all the strings and dates into NaNs – thus, I end up with 100% NaN-filled columns instead of rarely-populated data (among empty strings and NaTs).
Furthermore, if I move the "with-data" lines up – even a few dozens positions up – readtable() starts to read everything normally!
So, it looks like readtable() checks only ~250 first values to determine the type of the column, which, in my opinion, is a bug! (Although I understand that it was likely made to improve speed.)
Is there a way to fix it systematically? I have lots of such CSVs with thousands of columns in them – so, a manual check and manual fix is not an option…
UPD: a test-file (truncated to 510 lines) is attached – the behaviour is still the same. The problem columns are the 2nd and the 3rd (p190, p191). The first non-empty value is on data-line 270.I am reading a big CSV file (500K lines) with readtable. In the CSV, some columns have the first 250+ lines empty (e.g. ",,,," in the CSV), while the non-missing values below (pretty rare) are either text strings or dates (in the DD-MM-YYYY format). Readtable() somehow interprets these columns as numeric, and so converts all the strings and dates into NaNs – thus, I end up with 100% NaN-filled columns instead of rarely-populated data (among empty strings and NaTs).
Furthermore, if I move the "with-data" lines up – even a few dozens positions up – readtable() starts to read everything normally!
So, it looks like readtable() checks only ~250 first values to determine the type of the column, which, in my opinion, is a bug! (Although I understand that it was likely made to improve speed.)
Is there a way to fix it systematically? I have lots of such CSVs with thousands of columns in them – so, a manual check and manual fix is not an option…
UPD: a test-file (truncated to 510 lines) is attached – the behaviour is still the same. The problem columns are the 2nd and the 3rd (p190, p191). The first non-empty value is on data-line 270. I am reading a big CSV file (500K lines) with readtable. In the CSV, some columns have the first 250+ lines empty (e.g. ",,,," in the CSV), while the non-missing values below (pretty rare) are either text strings or dates (in the DD-MM-YYYY format). Readtable() somehow interprets these columns as numeric, and so converts all the strings and dates into NaNs – thus, I end up with 100% NaN-filled columns instead of rarely-populated data (among empty strings and NaTs).
Furthermore, if I move the "with-data" lines up – even a few dozens positions up – readtable() starts to read everything normally!
So, it looks like readtable() checks only ~250 first values to determine the type of the column, which, in my opinion, is a bug! (Although I understand that it was likely made to improve speed.)
Is there a way to fix it systematically? I have lots of such CSVs with thousands of columns in them – so, a manual check and manual fix is not an option…
UPD: a test-file (truncated to 510 lines) is attached – the behaviour is still the same. The problem columns are the 2nd and the 3rd (p190, p191). The first non-empty value is on data-line 270. readtable, missing values, csv MATLAB Answers — New Questions
How to add labels to lines on a plot in MATLAB?
When there are a lot of lines on a plot, it can be difficult to use a legend to distinguish individual lines. How can I label individual lines on a plot in MATLAB?When there are a lot of lines on a plot, it can be difficult to use a legend to distinguish individual lines. How can I label individual lines on a plot in MATLAB? When there are a lot of lines on a plot, it can be difficult to use a legend to distinguish individual lines. How can I label individual lines on a plot in MATLAB? legend, line, label, text, annotation MATLAB Answers — New Questions
Change configurations of the WLAN HDL examples of transmitter and receiver
Dear all,
I am recently trying to use the WLAN examples of the wireless HDL toolbox:
https://jp.mathworks.com/help/wireless-hdl/ug/wlanhdltransmitter.html
https://jp.mathworks.com/help/wireless-hdl/ug/wlanhdlreceiver.html
In these two examples of transmitter and receiver, it seems to support 802.11a/n/ac.
For instance, I would like to use 802.11n, then these should be selected:
HT: switched by "frameFormat"?
ODFM only: How to select?
MCS: which one should be select?
For 20 MHz channel bandwidth, which clock rare should be used in FPGA to drive the HDL codes?
ADC bit width: It seems to be 32 bit by default. How can I change to other bit width?
If I would like to use other than a/n/ac, how can I do?
For such kinds of the configurations or so, I would appreciate if anyone can instruct me how to change them before generating HDL.
Thank you in advance.Dear all,
I am recently trying to use the WLAN examples of the wireless HDL toolbox:
https://jp.mathworks.com/help/wireless-hdl/ug/wlanhdltransmitter.html
https://jp.mathworks.com/help/wireless-hdl/ug/wlanhdlreceiver.html
In these two examples of transmitter and receiver, it seems to support 802.11a/n/ac.
For instance, I would like to use 802.11n, then these should be selected:
HT: switched by "frameFormat"?
ODFM only: How to select?
MCS: which one should be select?
For 20 MHz channel bandwidth, which clock rare should be used in FPGA to drive the HDL codes?
ADC bit width: It seems to be 32 bit by default. How can I change to other bit width?
If I would like to use other than a/n/ac, how can I do?
For such kinds of the configurations or so, I would appreciate if anyone can instruct me how to change them before generating HDL.
Thank you in advance. Dear all,
I am recently trying to use the WLAN examples of the wireless HDL toolbox:
https://jp.mathworks.com/help/wireless-hdl/ug/wlanhdltransmitter.html
https://jp.mathworks.com/help/wireless-hdl/ug/wlanhdlreceiver.html
In these two examples of transmitter and receiver, it seems to support 802.11a/n/ac.
For instance, I would like to use 802.11n, then these should be selected:
HT: switched by "frameFormat"?
ODFM only: How to select?
MCS: which one should be select?
For 20 MHz channel bandwidth, which clock rare should be used in FPGA to drive the HDL codes?
ADC bit width: It seems to be 32 bit by default. How can I change to other bit width?
If I would like to use other than a/n/ac, how can I do?
For such kinds of the configurations or so, I would appreciate if anyone can instruct me how to change them before generating HDL.
Thank you in advance. wlan, wireless, hdl, simulink, matlab MATLAB Answers — New Questions
How to align multiline label and legend?
Hello
Using sprintf it is possible to create multiline labels in a legend. However, as shown in the example below, it would be better if the legend symbol (the colored line) would always be aligned with the first line of the multiline label, so aligned on top instead of being centered. The current output looks a bit confusing. Is it possible to control the position of the legend symbol w.r.t. the label?
Thanks in advance.
x=1:5;
y1=x;
y2=x.^2;
y3=x.^3;
plot(x,y1)
hold on
plot(x,y2)
plot(x,y3)
legend({‘first graph $y=x$’, sprintf(‘%sn%s’, ‘second graph’, ‘$y=x^2$’), sprintf(‘%sn%s’, ‘third graph’, ‘$y=x^3$’)}, ‘Interpreter’, ‘latex’)Hello
Using sprintf it is possible to create multiline labels in a legend. However, as shown in the example below, it would be better if the legend symbol (the colored line) would always be aligned with the first line of the multiline label, so aligned on top instead of being centered. The current output looks a bit confusing. Is it possible to control the position of the legend symbol w.r.t. the label?
Thanks in advance.
x=1:5;
y1=x;
y2=x.^2;
y3=x.^3;
plot(x,y1)
hold on
plot(x,y2)
plot(x,y3)
legend({‘first graph $y=x$’, sprintf(‘%sn%s’, ‘second graph’, ‘$y=x^2$’), sprintf(‘%sn%s’, ‘third graph’, ‘$y=x^3$’)}, ‘Interpreter’, ‘latex’) Hello
Using sprintf it is possible to create multiline labels in a legend. However, as shown in the example below, it would be better if the legend symbol (the colored line) would always be aligned with the first line of the multiline label, so aligned on top instead of being centered. The current output looks a bit confusing. Is it possible to control the position of the legend symbol w.r.t. the label?
Thanks in advance.
x=1:5;
y1=x;
y2=x.^2;
y3=x.^3;
plot(x,y1)
hold on
plot(x,y2)
plot(x,y3)
legend({‘first graph $y=x$’, sprintf(‘%sn%s’, ‘second graph’, ‘$y=x^2$’), sprintf(‘%sn%s’, ‘third graph’, ‘$y=x^3$’)}, ‘Interpreter’, ‘latex’) legend, multiline, align MATLAB Answers — New Questions
Why don’t gain and phase margins appear on my Bode plot?
I have discrete-time frequency response data in the form of a "frd" object. When I try to show the gain and phase margins associated with this data using the "bodeplot" function, these gain and phase margins do not appear on the plot. What am I missing?I have discrete-time frequency response data in the form of a "frd" object. When I try to show the gain and phase margins associated with this data using the "bodeplot" function, these gain and phase margins do not appear on the plot. What am I missing? I have discrete-time frequency response data in the form of a "frd" object. When I try to show the gain and phase margins associated with this data using the "bodeplot" function, these gain and phase margins do not appear on the plot. What am I missing? bodeplot, margin MATLAB Answers — New Questions
error “Error in untitled (line 9)”
I’m trying to run the following code, byt I have the error "Error in untitled (line 9) [t,x]=ode45(‘prob’,tspan,x0);" .
Why is that happening? Can anyone help me, please? Thank you!
%Numerical Solutions
%Problem #57
clc
clear
close all
%Numerical Solution
x0=[0;0];
tspan=[0 15];
[t,x]=ode45(‘prob’,tspan,x0);
figure(1)
plot(t,x(:,1));
title(‘Problem #57’);
xlabel(‘Time, sec.’);
ylabel(‘Displacement, m’);
hold on
%Analytical Solution
m=100;
c=20;
k=1000;
F=30;
w=sqrt(k/m);
d=c/(2*w*m);
wd=w*sqrt(1-d^2);
to=1;
phi=atan(d/sqrt(1-d^2));
%for t<to
t=linspace(0,1,3);
x=0.*t;
plot(t,x,’*’);
%for t>=to
t=linspace(1,15);
x=F/k-F/(k*sqrt(1-d^2)).*exp(-d.*w.*(t-to)).*cos(wd.*(t-to)-phi);
plot(t,x,’*’);
legend(‘Numerical’, ‘Analytical’)
%M-file for Prob #50
function dx=prob(t,x)
[rows, cols]=size(x);dx=zeros(rows, cols);
m=100;
c=20;
k=1000;
F=30;
if t<1
dx=0;
else
dx(1)=x(2);
dx(2)=-c/m*x(2) – k/m*x(1) + F/m;
end
endI’m trying to run the following code, byt I have the error "Error in untitled (line 9) [t,x]=ode45(‘prob’,tspan,x0);" .
Why is that happening? Can anyone help me, please? Thank you!
%Numerical Solutions
%Problem #57
clc
clear
close all
%Numerical Solution
x0=[0;0];
tspan=[0 15];
[t,x]=ode45(‘prob’,tspan,x0);
figure(1)
plot(t,x(:,1));
title(‘Problem #57’);
xlabel(‘Time, sec.’);
ylabel(‘Displacement, m’);
hold on
%Analytical Solution
m=100;
c=20;
k=1000;
F=30;
w=sqrt(k/m);
d=c/(2*w*m);
wd=w*sqrt(1-d^2);
to=1;
phi=atan(d/sqrt(1-d^2));
%for t<to
t=linspace(0,1,3);
x=0.*t;
plot(t,x,’*’);
%for t>=to
t=linspace(1,15);
x=F/k-F/(k*sqrt(1-d^2)).*exp(-d.*w.*(t-to)).*cos(wd.*(t-to)-phi);
plot(t,x,’*’);
legend(‘Numerical’, ‘Analytical’)
%M-file for Prob #50
function dx=prob(t,x)
[rows, cols]=size(x);dx=zeros(rows, cols);
m=100;
c=20;
k=1000;
F=30;
if t<1
dx=0;
else
dx(1)=x(2);
dx(2)=-c/m*x(2) – k/m*x(1) + F/m;
end
end I’m trying to run the following code, byt I have the error "Error in untitled (line 9) [t,x]=ode45(‘prob’,tspan,x0);" .
Why is that happening? Can anyone help me, please? Thank you!
%Numerical Solutions
%Problem #57
clc
clear
close all
%Numerical Solution
x0=[0;0];
tspan=[0 15];
[t,x]=ode45(‘prob’,tspan,x0);
figure(1)
plot(t,x(:,1));
title(‘Problem #57’);
xlabel(‘Time, sec.’);
ylabel(‘Displacement, m’);
hold on
%Analytical Solution
m=100;
c=20;
k=1000;
F=30;
w=sqrt(k/m);
d=c/(2*w*m);
wd=w*sqrt(1-d^2);
to=1;
phi=atan(d/sqrt(1-d^2));
%for t<to
t=linspace(0,1,3);
x=0.*t;
plot(t,x,’*’);
%for t>=to
t=linspace(1,15);
x=F/k-F/(k*sqrt(1-d^2)).*exp(-d.*w.*(t-to)).*cos(wd.*(t-to)-phi);
plot(t,x,’*’);
legend(‘Numerical’, ‘Analytical’)
%M-file for Prob #50
function dx=prob(t,x)
[rows, cols]=size(x);dx=zeros(rows, cols);
m=100;
c=20;
k=1000;
F=30;
if t<1
dx=0;
else
dx(1)=x(2);
dx(2)=-c/m*x(2) – k/m*x(1) + F/m;
end
end error untitled MATLAB Answers — New Questions
Reading multiple sheets from an excel file
I have an excel spreadsheet and the data is seperated into a different sheet for each year but I want to have all of the years worth of data in one table so I was wondering what the best way to approach this is? Right now my code only gets the data from 2007 and thats it.
opt=detectImportOptions(‘BC1 2007-2020.xlsx’);
opt.VariableTypes(3)={‘double’};
BC1=readtable(‘BC1 2007-2020.xlsx’,opt);
BC1.Date=datetime(BC1{:,1},’InputFormat’,’dd/MM/yy HH:mm:ss’);
BC1=table2timetable(BC1);
plot(BC1.Date,BC1.WaterLevel_Meters);I have an excel spreadsheet and the data is seperated into a different sheet for each year but I want to have all of the years worth of data in one table so I was wondering what the best way to approach this is? Right now my code only gets the data from 2007 and thats it.
opt=detectImportOptions(‘BC1 2007-2020.xlsx’);
opt.VariableTypes(3)={‘double’};
BC1=readtable(‘BC1 2007-2020.xlsx’,opt);
BC1.Date=datetime(BC1{:,1},’InputFormat’,’dd/MM/yy HH:mm:ss’);
BC1=table2timetable(BC1);
plot(BC1.Date,BC1.WaterLevel_Meters); I have an excel spreadsheet and the data is seperated into a different sheet for each year but I want to have all of the years worth of data in one table so I was wondering what the best way to approach this is? Right now my code only gets the data from 2007 and thats it.
opt=detectImportOptions(‘BC1 2007-2020.xlsx’);
opt.VariableTypes(3)={‘double’};
BC1=readtable(‘BC1 2007-2020.xlsx’,opt);
BC1.Date=datetime(BC1{:,1},’InputFormat’,’dd/MM/yy HH:mm:ss’);
BC1=table2timetable(BC1);
plot(BC1.Date,BC1.WaterLevel_Meters); excel MATLAB Answers — New Questions
Tomcat in the Crosshairs: New Research Reveals Ongoing Attacks
News headlines reported that it took just 30 hours for attackers to exploit a newly discovered vulnerability in Apache Tomcat servers. But what does this mean for workloads relying on Tomcat? Aqua Nautilus researchers discovered a new attack campaign targeting Apache Tomcat. In this blog, we shed light on newly discovered malware that targets Tomcat servers to hijack resources.
News headlines reported that it took just 30 hours for attackers to exploit a newly discovered vulnerability in Apache Tomcat servers. But what does this mean for workloads relying on Tomcat? Aqua Nautilus researchers discovered a new attack campaign targeting Apache Tomcat. In this blog, we shed light on newly discovered malware that targets Tomcat servers to hijack resources.Read More
